DIY UltraViolet (UV) Light

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What is "Blacklight"?
OK, it's not really a black light. It's better to call it what it is: ultraviolet light. Let's start with a quick overview of light. Of course, light is an electromagnetic wave (oscillating electric and magnetic fields), but in this case the frequency is the important aspect. For some narrow range of frequencies, the human eye can detect these waves-this is called the visible spectrum. The lower frequency waves are interpreted by our eyes as the color red, and the higher frequency would be violet.
Here is a picture that might be useful.
Of course, you could break this spectrum of colors into seven parts: red, orange, yellow, green, blue, indigo, and violet. But what the heck is indigo? Really, you could break this into just three colors-red, green, blue-or a thousand colors if you prefer. I tell my students there are seven colors because that's how many Isaac Newton wanted there to be. Seven is a cool number, and back in Newton's day there were just seven regular moving objects in the sky: the Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn. Fun fact: That's the same order as the days of the week that are named after these objects. Save that for a party (along with radioactive bananas).
If you combine all of these colors of light together, your brain detects that as white light. If there is no light going into your eye, your brain interprets that as the color black (that's why a completely dark room looks black). But what about the infrared and ultraviolet on the sides of the spectrum? Their names and placement in the spectrum can be explained by their discovery. In 1880, William Herschel took white light and split it into the rainbow colors with a prism. He found that if he put a thermometer in the section past the red color of light, it would still warm up. There must be some type of light that humans can't see, but that still heat up the thermometer. Since it was below red, he called it infrared. The same is true for ultraviolet.
www.wired.com/...
What Can You Do With Ultraviolet Light?
Surely you've seen a UV light. They used to be popular at parties because they would make some materials on your clothes look like they were glowing. Also, the UV lights are used to detect different materials-like at a crime scene or in an escape room.
Music by Bensound- Hey

[@theguywithone]

That just limits the output to the blue and purple part of the visible spectrum, which is not the same as UV. It won't make UV-sensitive items fluoresce, like the invisible ink used on some forms of paper money.

[@nevergonnagiveafuck4296]

You know you are just making a purple flashlight? the filters will just absorb light that isn't their color, they won't somehow add energy to the light passing through to make it a higher frequency

[@DingbatToast]

Nope. That's just purple light.

[@finnanesedalmar8796]

thank you so much, so useful science

[@Ella.Bella_Mae]

Hi yall so the people who wanna use this for nails dont cause this is just a tinted flashlight you know those invisible pens like basically you write somehting in invisble marker and then theres a light i think thats uv light take the cap glue on the inside of an upside down rectangle tissue box boom you got your self a uv nail lamp

[@macsenwood9214]

That's cap, if it did work then the writing would glow bright fluorescent yellow-green.

[@patriota1978]

Are you normal?

[@alas43]

Finna find scorpions

[@PandaGamersHDNL]

the fact you see a microphone but don't use it in the intro frustrate me so much

[@melic6324]

Can you use this for nails

[@FarmingwithZana101]

Like what does it do?

[@wobbly_bubbly1235]

Purple light and UV light are not the same. We can't see UV light. Its purple because some of the visible light passes thru. Flashlights cant emit uv waves just from being purple.

[@wobbly_bubbly1235]

It's the same reason why the sun doesn't glow purple. The sun has ultra pure uv light.

[@FarmingwithZana101]

@@wobbly_bubbly1235 hence we can’t see at night and there is a filter specialized for UV spectrum visualization that makes UV look purple

[@Cannotoad1201]

@@FarmingwithZana101what does uv have to do with nightvision.
It’s infrared that lets you see at night.

[@queenofhearts98652]

Thank u this was sooo helpful

[@eyeofsanatan]

That is fake by the way

[@glauciarodgers500]

Thank you 🙏🏽 I hope this work with my nails my cabine broken

[@chocolatefrosting4019]

Did it work?😯

[@giannos07]

@@chocolatefrosting4019 No, it will not work because this is just purple light not UV light

[@Cannotoad1201]

@@giannos07underrated comment

[@FoodAdventureswHazL]

This was kinda cool!

[@koningklootzak7788]

Did you use a normal yellow marker or UV marker?
If latter, which brand? Name please.

[@TheRudz66]

Its works guys..

[@vr5varshan269]

This is can use for nail
Pls reply...?

[@ivanamds3147]

NO

[@kaveeshnimsara6434]

Can you use this for fish tank algee ?

[@standerslim8165]

Broo u need to use microphone

[@romanweglarek7586]

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